Electrochimica Acta最新文献

{"title":"Lithium-ion battery separators based on sustainable collagen and chitosan hybrid membranes","authors":"Mireia Andonegi ,&nbsp;João P. Serra ,&nbsp;Maria M. Silva ,&nbsp;Renato Gonçalves ,&nbsp;Carlos M. Costa ,&nbsp;Senentxu Lanceros-Mendez ,&nbsp;Koro de la Caba ,&nbsp;Pedro Guerrero","doi":"10.1016/j.electacta.2025.146087","DOIUrl":"10.1016/j.electacta.2025.146087","url":null,"abstract":"<div><div>This work focuses on the production of sustainable membranes based on collagen and chitosan as separators in lithium-ion batteries. Membranes were prepared by freeze-drying with varying collagen and chitosan contents. All membranes show interconnected pores with different pore sizes and porosity above 90 %, allowing high values of electrolyte uptake. As for thermal and mechanical characteristics, the addition of chitosan improves both thermal and mechanical stability. After 1 M LiPF₆ in EC:DMC electrolyte uptake, the ionic conductivity is above 0.49 mS·cm^-1 for all membranes and is most affected by the collagen content. Furthermore, the membranes present a lithium transfer number value of 0.2. In cathodic half-cells with LiFePO₄, the obtained room temperature discharge capacity is above 140 mAh·g^-1 at C/8 rate. For high C rates (C and 2C rates), the membranes with 80 wt % of collagen and 20 wt % of chitosan present 42 mAh·g^-1 after 100 cycles at C rate, demonstrating adequate reversibility. Considering the need for more environmentally friendly materials and methods compatible with a circular economy, the bio-based membranes developed in this work constitute an alternative for synthetic separators.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146087"},"PeriodicalIF":5.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A modification strategy for synthesizing single-crystal LiNi0.6Co0.2Mn0.2O2 with superior electrochemical performance","authors":"Xinxin Zhao ,&nbsp;Qixuan Ruan ,&nbsp;Yuliang Li ,&nbsp;Boning Li ,&nbsp;Xiaoyan Yan ,&nbsp;Xiaohua Zhang ,&nbsp;Huiqin Chen ,&nbsp;Jianhua Fan","doi":"10.1016/j.electacta.2025.146225","DOIUrl":"10.1016/j.electacta.2025.146225","url":null,"abstract":"<div><div>Monocrystalline Ni-rich layered oxide is a promising cathode material with excellent cyclic stability attributed to the absence of grain boundaries. However, the majority of single-crystal LiNi_xCo_yMn_1-x-yO₂ (NCM) cathodes are prepared by the traditional high-temperature solid-phase method displays \"quasi single crystals\" formed through particle aggregation, and then the true single crystals can be obtained through subsequent ball milling or air crushing, leading to irregular and uneven morphology. Herein, we synthesize microsized single-crystal LiNi_0.6Co_0.2Mn_0.2O₂ (SC 622) materials utilize a modified molten-salt method, which using LiOH·H₂O and Li₂SO₄ as molten agent. Furthermore, the influence of the ratio of LiOH·H₂O and Li₂SO₄ on the morphology and electrochemical properties of LiNi_0.6Co_0.2Mn_0.2O₂ cathode is studied firstly in detail. Multiple characterization results manifested that the SC 622 material when prepared by using the molar ratio of Li₂SO₄ to LiOH·H₂O is 1:12 (SC 622–12) exhibits superior electrochemical performance. The SC 622–12 displays a specific capacity of 185.1 mAh g⁻¹ at 0.1 C and 123.4 mAh g⁻¹ at 5 C rate under the voltage range of 2.7–4.3 V. The capacity retention rates were 93.2 % and 91.7 % after 200 cycles at 1 C and 5 C, respectively. This work confirmed that the single-crystal NCM can be prepared by an effective molten-assisted strategy and can guide the synthesis of other cathode materials.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146225"},"PeriodicalIF":5.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generation of pits on CoCrFeMnNi high entropy alloy: an electrochemical impedance study of a single event","authors":"Yaojun Hou ,&nbsp;Oumaïma Gharbi ,&nbsp;Kevin Ogle ,&nbsp;Fan Sun ,&nbsp;Mireille Turmine ,&nbsp;Vincent Vivier","doi":"10.1016/j.electacta.2025.146193","DOIUrl":"10.1016/j.electacta.2025.146193","url":null,"abstract":"<div><div>In this study, a single pit was successfully generated on the surface of a CoCrFeMnNi alloy using a home-made device consisting of an electrochemical work station coupled with a microflow-cell. The three-dimensional morphology of the single pit was observed by optical microscopy, revealing that the pit radius increased with the polarization of the material, while at the same time the pit depth remained constant. Additionally, the various stages of pit evolution, including pit initiation, pit propagation, and pit repassivation were investigated as a function of the alloy polarization using electrochemical methods, in particular, electrochemical impedance spectroscopy (EIS). The incubation and initiation rates of a single pit increased with the anodic polarization of the electrode, which was attributed to an increase in the dissolution kinetics. The mechanism during the propagation phase was shown to be independent of the polarization potential. Interestingly, it was also shown that the repassivation step occurred in distinct stages, potentially due to a limited ion diffusion, which warrants further investigation.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146193"},"PeriodicalIF":5.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zwitterionic liquid electrolyte with efficient Li+ transfer modulated by ion pair for low-temperature lithium battery","authors":"Chenye Wang ,&nbsp;Yan Dai ,&nbsp;Rongrong Cao ,&nbsp;Lei Bai ,&nbsp;Jie Zhang ,&nbsp;Wenjia Wu ,&nbsp;Weijie Kou ,&nbsp;Jingtao Wang","doi":"10.1016/j.electacta.2025.146224","DOIUrl":"10.1016/j.electacta.2025.146224","url":null,"abstract":"<div><div>Zwitterions, covalently tethered by cation and anion, show great potential in the development of safe and high-performance electrolyte owing to the inherent characteristics of non-volatility, non-flammability, and electrification but non migration. The interaction between cations and anions in zwitterionic-lithium salt electrolyte is supposed to influence the lithium ions (Li⁺) migration efficiency, but being rarely studied. Herein, zwitterionic liquid (ZIL) electrolytes with three different anionic groups (−PO₄⁻, −SO₃⁻, −COO⁻) were synthesized. We demonstrate that the −PO₄⁻ group with the most negative electrostatic potential exerts the strongest competitive coordination effect on Li⁺, weakening Li⁺-TFSI⁻ binding and promoting lithium salt dissociation. This coordination also facilitates a lower migration energy barrier for Li⁺ and lessens intermolecular forces between zwitterions, reducing the freezing point. The ZIL-P electrolyte with the −PO₄⁻ group shows high Li⁺ transference number (0.54 at −40 °C) and ionic conductivity (1.57 × 10⁻⁴ S cm⁻¹ at −20 °C), outperforming most liquid electrolytes. The enhanced Li⁺ transfer results in excellent cycling stability, with a 98.1 % capacity retention after 500 cycles at 0.5C. Furthermore, the gel electrolyte constructed with ZIL-P and silicon-based framework improved battery performance: LFP|SiGE-ZIL-P|Li after 600 cycles with capacity retention rate of 98.5 % at 0.5C and −20 °C.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"527 ","pages":"Article 146224"},"PeriodicalIF":5.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143813939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Additive-induced robust interphases on the interface of LiNi0.8Co0.1Mn0.1O2 cathode for long-term stability of lithium-ion batteries at high voltage of 4.8 V","authors":"Runxin Wang ,&nbsp;Jianing Li ,&nbsp;Kunfang Wang ,&nbsp;Xuequan Zhu ,&nbsp;Qingyue Zhu ,&nbsp;Yanyan Chen ,&nbsp;Xiangguo Teng ,&nbsp;Xin Su","doi":"10.1016/j.electacta.2025.146214","DOIUrl":"10.1016/j.electacta.2025.146214","url":null,"abstract":"<div><div>Nickel-rich LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) material is anticipated to be the cathode material of the upcoming generation lithium-ion batteries (LIBs). Nevertheless, the actual use of NCM811 is limited by its structural instability under high voltage cycling. To enhance the NCM811 cyclic stability at a high voltage, we suggest an additive-induced strategy to create a robust interphase on electrode surface. The lithium difluorophosphate (LiPO₂F₂, LiDFP) additive decomposes on the electrode surface before the baseline electrolyte does. This decomposition creates a thin, uniform film known as the cathode-electrolyte interface (CEI). Through a series of experimental tests, it is found that the CEI film induced by LiDFP additive could effectively prevent electrolyte from decomposing and mitigate the strain and crack formation in the cathode. retains a high capacity of 91.8 % after 100 cycles at 4.8 V. This is significantly higher than the 73.3 % capacity retention observed with the baseline electrolyte. LiDFP oxidizes and decomposes before the electrolyte, forming a robust CEI film that mitigates NCM811 cathode strain/cracking, suppresses transition metal (TM) dissolution, and enhances NCM811 material stability.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146214"},"PeriodicalIF":5.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hollow carbon fiber supported MoS2 nanosheets composite for reliable sulfur electrochemistry","authors":"Junyi Zhang,&nbsp;Jin Luo,&nbsp;Yingjie Yu,&nbsp;Lixiang Ding,&nbsp;Haijun Zhang,&nbsp;Wen Lei","doi":"10.1016/j.electacta.2025.146204","DOIUrl":"10.1016/j.electacta.2025.146204","url":null,"abstract":"<div><div>The structural modification of sulfur hosts plays a pivotal role in addressing the current challenges encountered by lithium-sulfur batteries (LSBs), including severe shuttle effects, slow redox reactions, and volume expansion. In this research, we synthesize a novel hollow \"tube-in-tube\" carbon fiber support (CNT@HCNF) through electrospinning followed by a carbonization process. On this basis, molybdenum disulfide (MoS₂) nanosheets are uniformly deposited on the internal and external surfaces of the CNT@HCNF via a hydrothermal synthesis strategy to form a novel composite cathode material designated as CNT@HCNF@MoS₂. The interwoven CNT@HCNF enhances the conductivity and offers sufficient sulfur storage space, while the <em>in-situ</em> generated MoS₂ further improves the specific surface area with a large number of catalytic active sites. This particular structural design promotes the adsorption of soluble long-chain polysulfides, and accelerates the migration rate of lithium ions, effectively alleviating the aforementioned issues. Owing to its unique structure and the intrinsic properties of robust adsorptive and catalytic capabilities towards soluble polythionates, CNT@HCNF@MoS₂/S electrode exhibits a high large discharge capacity of 1176 mAh·g^-1 at 0.2 C, with a retention capacity of 733 mAh·g^-1 (2.0 C) after 250 cycles.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146204"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porous Cu9S5 nanonets as an efficient cathode material for high-capacity rechargeable magnesium batteries","authors":"Ye Xiong ,&nbsp;Yang Cong ,&nbsp;Yafei Huang ,&nbsp;Xugeng Guo","doi":"10.1016/j.electacta.2025.146213","DOIUrl":"10.1016/j.electacta.2025.146213","url":null,"abstract":"<div><div>Rechargeable magnesium batteries (RMBs) have garnered special interest as a promising energy-storage technology owing to elemental abundance and high theoretical volumetric capacity of Mg. Their development, however, is still limited owing to the absence of capable cathode materials for any potential applications. Herein, the Cu₉S₅ nanonets are synthesized by a facile hydrothermal treatment, and then used as a feasible cathode for RMB, which can deliver a high initial discharge specific capacity of 420.1 mAh g^–1 at 100 mA g^–1, and an impressive reversible capacity of 279.2 mAh g^–1 after 48 cycles at 50 mA g^–1. This outstanding performance is attributed to the unique net-like nanostructure of Cu₉S₅, which facilitates the diffusion and reaction kinetics of Mg²⁺ ions. Moreover, the Mg-storage mechanism containing a two-step conversion reaction was also discussed. The present study will encourage further investigation on the optimization of cathode materials for high-capacity Mg batteries.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146213"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic coupling of g-C3N4 and SrV2O6 nanocomposites as advanced electrode materials for aqueous and solid-state supercapacitors","authors":"Murugesan Karuppaiah ,&nbsp;Palanisamy Rajkumar ,&nbsp;Neela Mohan Chidambaram ,&nbsp;Vediyappan Thirumal ,&nbsp;Abdullah N. Alodhayb ,&nbsp;Saravanan Pandiaraj ,&nbsp;Kisoo Yoo ,&nbsp;Jinho Kim ,&nbsp;Jung Kyoo Lee","doi":"10.1016/j.electacta.2025.146212","DOIUrl":"10.1016/j.electacta.2025.146212","url":null,"abstract":"<div><div>In this study, we successfully synthesized pristine SrV₂O₆ and SrV₂O₆/g-C₃N₄ nanocomposites, unveiling their exceptional electrochemical performance with a focus on the impact of g-C₃N₄ content. Both materials exhibited battery-type behavior, but the SrV₂O₆/g-C₃N₄ (1:5) nanocomposite stood out with a remarkable specific capacitance of 512 F/g at 1 A/g and an outstanding cycle retention of 90.86 % after 5000 cycles. This superior performance stems from the synergistic integration of g-C₃N₄ nanosheets with self-assembled micro-nano SrV₂O₆ particles, forming a robust hybrid structure architecture. This optimized structure enhances electrical conductivity, facilitates rapid ion diffusion, and accelerates Faradaic redox kinetics, collectively boosting charge storage efficiency. Furthermore, the fabricated aqueous hybrid supercapacitor (HSC) achieved an impressive energy density of 35.66 Wh/kg at a power density of 750 W/kg, maintaining 90.04 % capacitance retention after 10,000 cycles. Likewise, the solid-state HSC delivered a commendable energy density of 23.20 Wh/kg at a power density of 750 W/kg at the same power density, retaining 84.86 % capacitance after 10,000 cycles. These exceptional electrochemical properties underscore the potential of SrV₂O₆/g-C₃N₄ nanocomposites for next-generation high-performance energy storage systems, making them promising candidates for real-world applications.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146212"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Apparent transport numbers from Seebeck coefficients for ion-exchange membranes","authors":"Simon B.B. Solberg ,&nbsp;Peder L. Holmqvist ,&nbsp;Kim R. Kristiansen ,&nbsp;Signe Kjelstrup","doi":"10.1016/j.electacta.2025.146126","DOIUrl":"10.1016/j.electacta.2025.146126","url":null,"abstract":"<div><div>We present a new procedure to find apparent transport numbers for ion-exchange membranes from the Seebeck coefficient as function of the electrolyte partial molar entropy. The method is relevant for several membrane processes, e.g. reverse and normal electrodialysis. Here, we report data for single-electrolyte solutions, as well as aqueous solutions of both MgCl<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and NaCl with molalities varying from 0.001 to 0.3 mol/kg, and for molality ratios <span><math><mrow><mi>ϵ</mi><mo>=</mo><msub><mrow><mi>m</mi></mrow><mrow><msub><mrow><mi>MgCl</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></msub><mo>/</mo><msub><mrow><mi>m</mi></mrow><mrow><mi>NaCl</mi></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>02</mn></mrow></math></span> and 0.03. Apparent transport numbers of the Fumasep FKS-75 <span><math><mi>μ</mi></math></span>m membranes in contact with single-electrolyte solutions were <span><math><mrow><mn>0</mn><mo>.</mo><mn>99</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>06</mn></mrow></math></span>, <span><math><mrow><mn>1</mn><mo>.</mo><mn>02</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>03</mn></mrow></math></span>, <span><math><mrow><mn>0</mn><mo>.</mo><mn>35</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>04</mn></mrow></math></span> and <span><math><mrow><mn>0</mn><mo>.</mo><mn>43</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>04</mn></mrow></math></span> for chlorides of Na<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span>, K<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span>, Mg<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span> and Ca^2＋, respectively. The membrane apparent transport numbers of Mg<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span> and Na<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span> in the two salt mixture were estimated by a weighting method, involving an empirically defined hydration coefficient. The results showed a significant selectivity towards Mg<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span>. The presence of Mg<span><math><msup><mrow></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></math></span> in an aqueous solution of NaCl (sea water) may therefore significantly lower the efficiency of the Fumasep FKS-membrane for, say, reverse electrodialysis.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"527 ","pages":"Article 146126"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High mass loading flower-like crystalline/amorphous NiCo-P/POx/NF as self-supporting cathode for ultra-high-performance nickel-zinc batteries","authors":"Lihong Zheng ,&nbsp;Fenyun Yi ,&nbsp;Jie Kong ,&nbsp;Jiahui Liang ,&nbsp;Min Lu ,&nbsp;Aimei Gao ,&nbsp;Dong Shu","doi":"10.1016/j.electacta.2025.146210","DOIUrl":"10.1016/j.electacta.2025.146210","url":null,"abstract":"<div><div>The aqueous nickel-zinc battery combines the advantages of battery-level energy density and capacitor-level power density, which has been anticipated since its advent. However, given the limitations imposed by the relatively low capacity and subpar conductivity of the cathode, Ni-Zn batteries have unsatisfactory energy density and cycle life. This work has fabricated in situ a flower-like crystalline/amorphous nickel-cobalt phosphide/phosphate on nickel foam (NiCo-P/PO_x/NF), which acts as a binder-free cathode for the advanced aqueous Ni-Zn battery. NiCo-P/PO_x/NF inherits the flower-like structure of its predecessor, which can expose more active sites. Amorphous NiCoPO_x encases isolated crystalline NiCoP nanoparticles, and this particular structure can handle the volume expansion caused by long-term cycling. Consequently, the NiCo-P/PO_x/NF electrode achieves an ultra-high areal capacitance of 23.4 F·cm⁻² at a high mass loading of 12.0 mg·cm⁻² and demonstrates excellent cycling stability, retaining 80 % after 8000 cycles. The NiCo-P/PO_x/NF//Zn battery exhibits an area energy density of 4.05 mWh·cm⁻² and a peak power density of 32.57 mW·cm⁻², which are considerably higher than the values for most of the previously reported aqueous Ni-Zn batteries. This work offers a feasible strategy for developing aqueous alkaline Ni-Zn batteries featuring high energy and power densities.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"526 ","pages":"Article 146210"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}